Compact, high repetition rate (∼GHz${\sim}{\rm GHz}$ level) femtosecond fiber lasers are attractive for high-precision, high-speed scientific and engineering fields. However, the noise of such a laser seems far higher than low repetition rate ones, which limits its application. Motivated by this challenge, we combined the solid state and the fiber laser into a novel and highly stable “solid-state fiber laser” operating at 840 MHz repetition rate. Benefitting from the robust architecture of “optical cubes,” the laser shows an ultralow timing jitter (130 as) in free-running operation. This is the first time the timing jitter of a high repetition rate fiber laser has been brought to the attosecond level, to the best of our knowledge. This breakthrough makes an impact on the concept that the high repetition rate is associated with high timing jitter in fiber lasers and opens the way for real-world applications of these lasers.

中文翻译：

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来自高重复率飞秒“固态光纤激光器”的阿秒定时抖动

紧凑，高重复率（∼ G H z${\sim}{\rm GHz}$level) 飞秒光纤激光器对高精度、高速的科学和工程领域具有吸引力。然而，这种激光器的噪声似乎远高于低重复率激光器，这限制了它的应用。受这一挑战的启发，我们将固态和光纤激光器组合成一种新型且高度稳定的“固态光纤激光器”，重复频率为 840 MHz。得益于“光学立方体”的稳健架构，该激光器在自由运行时显示出超低的时序抖动 (130 as)。据我们所知，这是高重复率光纤激光器的定时抖动首次达到阿秒级。